Abstract

A simple and general approach has been developed for the enhancement of random
lasing based on the composite consisting of nanospheres and nanorods array. Due
to the inherent nature of high refractive index, the selected nanorods act
efficiently as scattering feedback centers, which can promote the formation of
closed loop paths of the emission arising from nanospheres. To illustrate our
working principle, the composite consisting of
Tb(OH)3/SiO2 nanospheres and ZnO nanorods was chosen
as an example. Quite interestingly, it is found that the random lasing behavior
can be easily achieved for the composite system, while it is absent in pure
Tb(OH)3/SiO2 nanospheres. The strategy demonstrated
here should be very useful for the future development of coherent light emission
sources and many other optoelectronic devices.

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